Murphy 20T Temperature Swichgage®
Murphy Engine Oil Tempurature Switch Gauge 2, 140-300 DEG F
(20T-300-10-1/2)
Murphy Coolant Tempurature Switch Gauge 2", 130-250 DEG F
(20T-250-4-1/2)
Murphy Exhaust Tempurature Switch Gauge 2" 300-440 DEG F
(20T-440-10-1/2)
SPECIFICATIONS
PDF file
Dial: White on black; U.S.A. standard scale is dual scale °F/°C; others available
Case: Glass filled/Polycarbonate, corrosion-resistant; steel mounting clamp included
Bezel: Polished stainless steel, standard; others are available.
Pointer: Tempered nickel silver; red tip
Lens: Polycarbonate, high-impact
Sensing Element: Beryllium copper diaphragm
Capillary: PVC armored copper; 4 ft. (1.2 m).* Stainless steel armor optional
Sensing Bulb: Copper*
Gage Accuracy: See accuracy chart
Maximum Temperature: See Temperature Ranges and Factory Settings table
Maximum Ambient Temperature:-40° F (-40° C) through 150° F (66° C)
Adjustable Limit Contact (A20T and A25T):
SPST contact; pilot-duty only, 2 A @ 30 VAC/VDC; isolated from case ground. Closed when the high limit is met. Normally Open when pointer is in normal operating range. Contacts are gold flashed silver.
Limit Contact Adjustment: by a 1/16 in. hex wrench through 100%
of the scale.
Wiring:
A20T: Number 4 screw terminals;
A25T: Number 6 screw terminals.
Snap-Switch Rating (A20TE and A25TE): SPDT, 3 A @ 30 VDC
inductive; 4 A @ 125 VAC inductive
Wiring:
A20TE: Number 4 screw terminals;
A25TE: Number 6 screw terminals
Unit Weight:
A20 Series: 11.9 oz. (0.370 kg);
A25 Series Models: 13.3 oz. (0.413 kg)
Unit Dimensions: A20 Series: 4-3/4 x 4-3/4 x 3 in. (121 x 121 x 76 mm); A
